My E30 is in a coma... HELP! (1990 318i)
My E30 is in a coma... HELP! (1990 318i)
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BDR529

Original Poster:

3,560 posts

204 months

Wednesday 13th April 2011
quotequote all
Hello all.

The other day getting ready to leave Tescos, started the car, engine ran for the whole of 3 seconds before it spluttered and died. My fuel gauge had been rather low, though the light wasn't on, but assumed it had run out of fuel.

After filling it up with an entire jerry can, attempting to start it failed. I left it for a few minutes to make sure the fuel was in the lines. Tried again, pumped the accelerator, the engine wanted to turnover, but died again, and noticed a whining noise which sounded like the starter motor.

So after an hour of fiddling about and failed starts (making sure not to flood it) we have guessed the starter motor is knackered. But I was also told that something else may be responsible for the starter motor dying, and my mechanic mate also then mentioned the head of the engine might be the problem.. just to add fun into the mix.

So do you lot reckon trying a new starter motor is worth a go, or could there be another underlying, more serious problem?

Any help would be much appreciated, this is my only car, so I need to repair it ASAP, getting the bus into work is not fun. frown

I shall record the sound of the car attempting to start up, and put it on here tomorrow, just incase it gives away anymore clues as to what could be wrong.

Cheers biggrin

M888SXY

312 posts

187 months

Wednesday 13th April 2011
quotequote all
Bad news. Hope you get it fixed.

Is it an iS?

If so, definitely fix it!

E30M3SE

8,493 posts

226 months

Wednesday 13th April 2011
quotequote all
If it is the starter motor then the car should 'bump' start.

If the engine is turning over but not firing then it's not going to be the starter motor.

Have you got a spark at the plugs and fuel at the injectors?

When was the timing belt last changed?


Oi_Oi_Savaloy

2,315 posts

290 months

Wednesday 13th April 2011
quotequote all
If it was the head then you'd have noticed a couple of things (not necessarily together). Check the oil filler cap and dipstick. Is there a mayonnaise-like substance on them?

Or have you noticed that your coolant light has been coming on and that you've been topping up the header tank alot recently?




Seeker UK

1,443 posts

188 months

Wednesday 13th April 2011
quotequote all
I reckon it's the fuel pump relay.

BDR529

Original Poster:

3,560 posts

204 months

Tuesday 19th April 2011
quotequote all
Thanks for your replies

Seeker UK said:
I reckon it's the fuel pump relay.
E30Zone seems to think it's a fuel pump problem.
I've bought a new pump, though in hindsight I probably should have tried a new relay first hehe

Going to have a tinker tomorrow evening and see.

Edited by BDR529 on Tuesday 19th April 03:01

BDR529

Original Poster:

3,560 posts

204 months

Wednesday 20th April 2011
quotequote all
Well the relays were fine..



..discovered it was indeed the pump motor that had failed.

Put a new one in, then realised the pump assembly was wrong and designed for larger tanks with a return port already on them.

So this meant my old pump assembly had 2 pipes coming out the top..



Where as the new one only had one..



Hence starting the car petrol came flying out the left over hose, after me and my 2 mates had come to the conclusion it was probably an unused overflow hose or something. hehe

So the good news is that for the 5 seconds we had the engine running we discovered what had gone wrong, the bad news is that now the new pump needs to be fitted into the old assembly.

This will involve cutting the wires as they are soldered to the terminals on both the pump and the assembly.

This brings me to a question, would it be fine to solder the wires together and cover the soldering in electrical tape?

Alternatively, I have been told it might be okay just to crimp the wires together.

Are both these methods okay or will my car burst into flames?

Many thanks. biggrin

Edited by BDR529 on Wednesday 20th April 01:00

5678

6,146 posts

257 months

Wednesday 20th April 2011
quotequote all
E30's have a low petrol light?!

Seeker UK

1,443 posts

188 months

Wednesday 20th April 2011
quotequote all
Glad you're half way there..... :-)


john_p

7,073 posts

280 months

Wednesday 20th April 2011
quotequote all
Do you definitely have the right pump ?

eg my 328 has a supply only while 330s etc have a return feed .. so I wonder if it's an engine thing rather than a fuel tank thing, if that makes sense?

BDR529

Original Poster:

3,560 posts

204 months

Wednesday 20th April 2011
quotequote all
It's definitely the pump motor, the engine starts and runs with the new one fitted. The actual pump motor itself has the same part number as my old one.

Does anyone know which stores sell soldering irons? confused
Otherwise I have to buy one off ebay and wait if my mate can't find his.

E30M3SE

8,493 posts

226 months

Wednesday 20th April 2011
quotequote all
Maplins

Halfords

Get your self some heat shrink as well as insulation tape will not last 2 minutes immersed in unleaded.

Baked_bean

1,947 posts

222 months

Wednesday 20th April 2011
quotequote all
5678 said:
E30's have a low petrol light?!
they do, its below the bottom white line that it comes on.

5678

6,146 posts

257 months

Wednesday 20th April 2011
quotequote all
Baked_bean said:
they do, its below the bottom white line that it comes on.
Cool, I've never seen it on mine! I'll be brave and run it until it comes on this tank.